Change default from email for testing
Change default from email for testing

Also remove translation from DEFAULT_FROM_NAME.
If used, ugettext_lazy cause problems when sending emails.
From field is set as "django.utils.functional.__proxy__ object is a lazy translation."
Without ugettext_lazy in settings.py, translation does not work for
some reason. Needs further investigation.

shirlei/helios-server,shirlei/helios-server,shirlei/helios-server,shirlei/helios-server,shirlei/helios-server